log('b starting');
log('module.exports: ', module.exports);
exports.done = false;
const a = require('a');
log('in b, a.done = %s', a.done);
exports.done = true;
log('module.id: ', module.id);
log('module.exports: ', module.exports);
log('module.parent: %s', module.parent);
log('module.filename: %s', module.filename);
log('module.loaded: %s', module.loaded);
log('module.children: %s', module.children);
log('module.paths: %s', module.paths);
log('b done');